A water level switch

Abstract

The utility model discloses a water level switch relates to automatic switch technical field, it includes setting in the water tank inside floating assembly, the floating assembly contains setting in the water tank water body above buoy, and is provided with the connecting piece no.

Description

Technical Field

[0001] This utility model relates to the field of automatic switch technology, specifically a water level switch. Background Technology

[0002] In the field of household appliances such as dishwashers that involve water tank level control, accurate and reliable water level detection and control technology is crucial. Water level detection not only affects the washing effect, but also directly affects the safety and energy efficiency of the equipment. At the same time, water level control is also closely related to the operation of the heater. A reasonable water level can ensure the efficient and safe operation of the heater, avoid dangerous situations such as dry burning, and achieve the rational use of energy.

[0003] The existing water level detection devices used in dishwashers can only detect the water level in the tank and cannot effectively control the heater's on / off state based on the water level. When the water level in the tank is too low, if the heater continues to operate, it is very easy for the heater to dry-burn. Dry-burning will cause the heater temperature to rise sharply, which may not only damage the heater itself and shorten its service life, but also cause serious safety accidents such as fires, posing a threat to the life and property safety of users. At the same time, if the water level in the tank has not reached the required washing standard during dishwasher operation, but the heater starts heating prematurely, the amount of water heated at this time is insufficient to meet the washing needs, and water needs to be heated again later, which undoubtedly increases energy consumption.

[0004] Therefore, in order to address the above problems, the applicant needs to design a water level switch to solve the problem. Utility Model Content

[0005] The purpose of this invention is to provide a water level switch to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a water level switch, comprising a floating assembly disposed inside an existing water tank, the floating assembly being used to detect the water level in the water tank, the floating assembly including a float disposed above the water in the water tank, a connecting piece 1 disposed on the float, a rotating component disposed on the connecting piece 1, a fixed bracket hinged to the rotating component, and the fixed bracket being fixedly connected to the inner wall of the water tank, and a magnet 1 disposed on the connecting piece 1; and a control assembly disposed outside the water tank, the control assembly including a micro switch fixedly connected to the water tank, a connecting piece 2 disposed below the contact strip of the micro switch, a magnet 2 disposed on the connecting piece 2, and the magnet 2 being rotatably connected to the water tank, the magnet 2 cooperating with the magnet 1 to push the connecting piece 2 to rotate and press the contact strip of the micro switch.

[0007] Furthermore, the pontoon is a sealed hollow cylindrical structure.

[0008] Through the above structural design, the pontoon is limited to a sealed hollow cylindrical structure, which ensures that the pontoon has stable and lasting buoyancy and can move up and down accurately with the rise and fall of the water level.

[0009] Furthermore, a pin is provided at the hinge joint between the rotating component and the fixed bracket, and the two ends of the pin are axially limited by snap rings.

[0010] The above structural design improves the stability and durability of the floating component's mechanical structure.

[0011] Furthermore, the opposing surfaces of magnet one and magnet two have the same polarity, forming a magnetic repulsion coupling mechanism.

[0012] With the above structural design, when the water level rises and pushes the float and magnet one to move upward, the magnetic repulsion will drive magnet two and connecting piece two to rotate away from the water tank wall, thereby pressing the micro switch contact bar.

[0013] Furthermore, the water tank is made of a non-magnetic material.

[0014] The above structural design ensures that the magnetic lines of force between magnet one and magnet two can effectively pass through the water tank wall for coupling.

[0015] Furthermore, the non-magnetic material is plastic.

[0016] The above structural design achieves effective magnetic force transmission while also ensuring the product's economy, reliability, and safety.

[0017] Furthermore, a fixed shaft is rotatably mounted on the second magnet, and fixed blocks are fixedly mounted at both ends of the fixed shaft, and the fixed blocks are fixedly connected to the water tank.

[0018] The above structural design provides a stable and flexible fulcrum for the second magnet and the second connecting piece assembly.

[0019] Furthermore, the fixed shaft is made of a non-magnetic material.

[0020] The above structural design prevents the fixed shaft itself from interfering with the magnetic field around the magnet or causing a magnetic short circuit effect.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the water level switch uses the rising and falling water level to drive the float and the magnet to generate repulsive force, which accurately triggers the on / off state of the outer micro switch, thereby improving equipment safety and energy utilization efficiency. The specific details are as follows: When the water level switch is in use, as the water level in the tank rises, the float floats upward, causing the connecting piece 1 and magnet 1 to rotate upward around the pin axis. Since magnet 1 and magnet 2 located on the outside of the tank have the same polarity, they generate a repulsive force. This repulsive force pushes magnet 2 and the connecting piece 2 fixed to it to rotate around the fixed axis away from the tank wall, thereby pressing down on the connecting piece 2 and causing it to press the contact bar of the micro switch, triggering the micro switch to act. Through non-contact magnetic coupling, the water level height controls the on / off state of the micro switch, thereby controlling the start and stop of the heater and improving equipment safety and energy efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall initial state structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model in use. Figure 3 This is a schematic diagram of the floating component structure of this utility model; Figure 4 This is a schematic diagram of the control component structure of this utility model.

[0023] In the diagram: 1. Water tank; 2. Floating component; 3. Control component; 10. Fixed bracket; 20. Float; 21. Connecting piece 1; 22. Magnet 1; 23. Rotating component; 24. Pin; 30. Magnet 2; 31. Connecting piece 2; 32. Micro switch; 33. Fixed shaft. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-4As shown, a water level switch of this utility model includes a floating component 2 disposed inside an existing water tank 1, and the floating component 2 is used to detect the water level in the water tank 1. The floating component 2 includes a float 20 disposed above the water in the water tank 1, and a connecting piece 21 is disposed on the float 20. A rotating part 23 is disposed on the connecting piece 21, and a fixed bracket 10 is hinged to the rotating part 23. The fixed bracket 10 is fixedly connected to the inner wall of the water tank 1. A magnet 22 is disposed on the connecting piece 21. A control component 3 is disposed outside the water tank 1. The control component 3 includes a micro switch 32 fixedly connected to the water tank 1, and a connecting piece 31 is disposed below the contact strip of the micro switch 32. A magnet 30 is disposed on the connecting piece 31, and the magnet 30 is rotatably connected to the water tank 1. The magnet 30 and the magnet 22 cooperate to push the connecting piece 31 to rotate and press the contact strip of the micro switch 32. The micro switch 32 is used to start the heater to heat the water in the water tank 1.

[0026] The float 20 is a sealed hollow cylindrical structure. By limiting the float 20 to a sealed hollow cylindrical structure, it is ensured that the float 20 has stable and lasting buoyancy, and can accurately move up and down with the rise and fall of the water level. This indirectly supports the accurate control of the heater switch, and avoids the risk of water level misjudgment and dry burning or ineffective heating caused by the failure of the float 20.

[0027] A pin 24 is provided at the hinge between the rotating component 23 and the fixed bracket 10. The two ends of the pin 24 are axially limited by snap rings. The pin 24 and snap rings at the hinge between the rotating component 23 and the fixed bracket 10 improve the stability and durability of the mechanical structure of the floating component 2. It rotates flexibly and is not easy to loosen. It ensures that the float 20 can rotate smoothly and reliably around the fixed point when the water level changes. It can still accurately transmit water level information under long-term use, reducing the possibility of water level detection failure due to mechanical failure, which may lead to dry burning or energy waste.

[0028] Magnet 22 and Magnet 30 have the same polarity on their opposite surfaces, forming a magnetic repulsion coupling mechanism. When the water level rises and pushes the float 20 and magnet 22 upward, the magnetic repulsion will drive magnet 30 and connecting piece 31 to rotate away from the wall of the water tank 1, thereby pressing the contact bar of micro switch 32. This solves the sealing and leakage problems that may exist in traditional mechanical connections, while providing reliable and sensitive magnetic drive.

[0029] Water tank 1 is made of non-magnetic material. The specification that water tank 1 is made of non-magnetic material ensures that the magnetic lines of force between magnet 22 and magnet 30 can effectively pass through the wall of water tank 1 for coupling, avoiding the magnetic field being shielded or significantly weakened by the wall of water tank 1 itself. This ensures that the displacement of magnet 22 caused by water level changes can be accurately sensed and responded to by magnet 30 outside water tank 1, maintaining the reliability of water level detection and control signals.

[0030] The non-magnetic material is plastic, which further limits the non-magnetic material to plastic. While meeting the requirements of magnetic penetration, it makes full use of the characteristics of plastic materials such as low cost, easy processing and molding, corrosion resistance and insulation. While achieving effective magnetic force transmission function, it also takes into account the economy, reliability and safety of the product.

[0031] A fixed shaft 33 is rotatably mounted on magnet 2 30. Fixed blocks are fixedly mounted at both ends of the fixed shaft 33, and the fixed blocks are fixedly connected to water tank 1. The fixed shaft 33 rotatably mounted on magnet 2 30 and the fixed blocks at both ends of the fixed shaft 33 are connected to water tank 1, providing a stable and flexible rotation fulcrum for magnet 2 30 and connecting piece 2 31 assembly. This ensures that magnet 2 30 can freely and sensitively respond to the movement transmitted by inner magnet 1 22 through magnetic repulsion on the outside, thereby accurately driving connecting piece 2 31 to press or release the contact strip of micro switch 32, realizing reliable control of the heater circuit on and off.

[0032] The fixed shaft 33 is made of a non-magnetic material. This designation prevents the fixed shaft 33 from interfering with or creating a magnetic short circuit around the magnet 30. It maximizes the magnetic repulsion coupling efficiency between the magnet 30 and the magnet 22, ensuring that the rotation of the magnet 30 is driven entirely by magnetic repulsion and is unaffected by the material of the fixed shaft 33. This improves the sensitivity and reliability of the water level switch's external signal transmission and ensures the accuracy of the heater control commands.

[0033] Working principle: When the water level switch is used, when the water level in the water tank 1 rises, the float 20 floats upward, causing the connecting piece 21 and the magnet 22 to rotate upward around the pin 24. Since the magnet 22 and the magnet 30 located on the outside of the water tank 1 have the same polarity, a repulsive force is generated. This repulsive force pushes the magnet 30 and the connecting piece 31 fixed to it to rotate around the fixed shaft 33 away from the wall of the water tank 1, thereby pressing down the connecting piece 31 and causing it to press the contact bar of the micro switch 32, triggering the micro switch 32 to act. Conversely, when the water level drops, the float 20 falls, the magnet 22 returns to its original position, the magnetic repulsive force weakens or disappears, and the connecting piece 31 rebounds and resets under the elastic force or gravity of the micro switch 32, releasing the contact bar and disconnecting the micro switch 32. Thus, through non-contact magnetic coupling, the water level height is used to control the on / off state of the micro switch 32, thereby controlling the start and stop of the heater.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A water level switch, characterized in that, include: A floating assembly (2) is installed inside the existing water tank (1), and the floating assembly (2) is used to detect the water level in the water tank (1). The floating assembly (2) includes a float (20) installed above the water in the water tank (1), and a connecting piece (21) is provided on the float (20). A rotating part (23) is provided on the connecting piece (21), and a fixed bracket (10) is hinged on the rotating part (23). The fixed bracket (10) is fixedly connected to the inner wall of the water tank (1). A magnet (22) is provided on the connecting piece (21). The control component (3) is located on the outside of the water tank (1). The control component (3) includes a micro switch (32) fixedly connected to the water tank (1). A connecting piece (31) is provided below the contact bar of the micro switch (32). A magnet (30) is provided on the connecting piece (31). The magnet (30) is rotatably connected to the water tank (1). The magnet (30) cooperates with the magnet (22) to push the connecting piece (31) to rotate and press the contact bar of the micro switch (32).

2. A water level switch according to claim 1, characterized in that: The pontoon (20) is a sealed hollow cylindrical structure.

3. A water level switch according to claim 1, characterized in that: The hinge joint between the rotating component (23) and the fixed bracket (10) is provided with a pin (24), and the two ends of the pin (24) are axially limited by snap rings.

4. A water level switch according to claim 1, characterized in that: The opposite surfaces of magnet one (22) and magnet two (30) have the same polarity, forming a magnetic repulsion coupling mechanism.

5. A water level switch according to claim 1, characterized in that: The water tank (1) is made of non-magnetic material.

6. A water level switch according to claim 5, characterized in that: The non-magnetic material is plastic.

7. A water level switch according to claim 1, characterized in that: A fixed shaft (33) is rotatably mounted on the second magnet (30). Fixed blocks are fixedly mounted at both ends of the fixed shaft (33), and the fixed blocks are fixedly connected to the water tank (1).

8. A water level switch according to claim 7, characterized in that: The fixed shaft (33) is made of a non-magnetic material.

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